Gkrinding-mill



' .2 Sheets-Sheet 1. 'G. SANFORD.

I Grinding Mill. No 19,587, "Patented March9, 1858 2 Sheets-Sheet 2.

6. SAN FORD.

Grinding Mill.

Patented March 9-, 18 58.

* STATES rarnr orricn.

GELSTON SANFORD, OF POUGHKEEPSIE, NEW YORK.

GRINDING-MILL.

Specificatidn forming part of Letters Patent No. 19,587, dated March 9',1858; Beissued March 1, 1859, N0. 670.

To all whom it may concern:

Be it known that I, GELs'roN SANFORD, of Poughkeepsie, in the county ofDutchess and State of New York, have invented a new and usefulImprovement in Grinding-Mills,

the construction and operation of which I have described in thefollowing specification and illustrated in the accompanying drawingswith sufficient clearness to enable competent and skilful workmen in thearts to which it pertains or is most nearly allied to make and use myinvention.

-My said invention consists in giving to the edges ofa series of plateswhich have grinding surfaces upon their adjacent sides, and which grindby .means of combined lateral and longitudinal. motion, a notched formwhich will secure the breaking or shearing of the large pieces of thefeed, or other substance to be ground, and its introduction between thegrinding surfaces, as hereafter more fully set forth.

In the accompanying drawings Figure 1, is a side elevation of myimproved mill. Fig. 2, is a longitudinal sectional elevation of it. Fig.3, is a horizontal section of it. Fig. 4, is a transverse sectionalelevation.

A, A, are the side plates of the mill, which I usually make of commoncast iron.

B, B, are the legs by which the plates A are supported.

C is the hopper.

D, D, E, E, E, are the grinding plates. The plates E are stationaryexcept as to the adjustment necessary to regulate the fineness of themeal. The plates D have both a longitudinal and vibratory motion giventhem byturning the crank or crank shaft F, to which oneend of theseplates is attached. The other end is slotted and slides 40 upon the boltG as shown more clearly in Fig. 2. There is an opening in the plates Daround the bolt H, to allow them to slide and vibrate without beingarrested by the bolt. The upper edges of the plates D and E are notchedas represented, to insure the breaking of the coarser particles and theintroduction of their fragments between the plates, which the notchedform of the upper edge of the plates, and their compound motion are whencombined, admirably designed to accomplish; the vertical motion of theplates D being sure to bring these coarser particles where they cannotfail to be crushed by their longitudinal action.

The fineness of the meal is regulated by the set screw I, by which theplates may be crowded closer together,-or by withdrawing it they may beallowed greater distance, by which a coarser meal will be made.

The particular improvement which constitutes my said invention, andwhich I claim as having been originally and first invented by me isGiving the edges of the plates D and E 65 having a longitudinal andlateral motion with reference to each other, the notch form described orits equivalent, by which the breaking of the coarser particles, andtheir introduction between the plates is insured, 7 substantially as setforth.

'GELSTON SANFORD.

Witnesses C. K. CoRLIss,

PETER VANDERFORD.

[Fncsr PRINTED 1911.]

